66051120 has 80 divisors (see below), whose sum is σ = 216816480. Its totient is φ = 16576512.

The previous prime is 66051109. The next prime is 66051127. The reversal of 66051120 is 2115066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (66051127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4015 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (2710206).

Almost surely, 2^66051120 is an apocalyptic number.

66051120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66051120 is an abundant number, since it is smaller than the sum of its proper divisors (150765360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66051120 is a wasteful number, since it uses less digits than its factorization.

66051120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16222 (or 16216 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 66051120 is about 8127.1840141589. The cubic root of 66051120 is about 404.2283126054.

Adding to 66051120 its reverse (2115066), we get a palindrome (68166186).

The spelling of 66051120 in words is "sixty-six million, fifty-one thousand, one hundred twenty".